.sentiment-positive { color: #28a745; }
.sentiment-negative { color: #dc3545; }
.sentiment-mixed { color: #ffc107; }

.container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input[type="file"] {
    margin: 1rem 0;
}

button {
    background: #007bff;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.hidden {
    display: none;
}

#downloadLink {
    display: inline-block;
    margin-top: 1rem;
    color: #28a745;
}